How can I get Android Wifi Scan Results into a list

Question

I know how to get a  lt List gt  of Android Wifi Scans but I can not figure out the best way to make a list adapter out of them  I would like to just bind SSID and BSSID from a  lt List gt  of scans to text1 and text2   Samples of what I have been doing   wifi startScan               get list of the results in object format   like an array           List lt ScanResult gt  results   wifi getScanResults                 loop that goes through list         for  ScanResult result   results                Toast makeText this  result SSID         result level                      Toast LENGTH SHORT  show      And   private void fillDataFromDb             Cursor scanCursor   Db fetchAllScans            startManagingCursor scanCursor                Create an array to specify the fields we want to display in the list             only TITLE          String   from   new String     WifiDbAdapter KEY BSSID                  WifiDbAdapter KEY SSID                and an array of the fields we want to bind those fields to  in this            case just text1          int   to   new int     R id text1  R id text2                Now create a simple cursor adapter and set it to display         SimpleCursorAdapter scansdb   new SimpleCursorAdapter this                  R layout scan row  scanCursor  from  to           setListAdapter scansdb

User · Answer

Wrap an ArrayAdapter around your List lt ScanResult gt   Override getView   to populate your rows with the ScanResult data  Here is a free excerpt from one of my books that covers how to create custom ArrayAdapters like this

User · Answer

Find a complete working example below   The code by  Android is very good but has few issues  namely    Populating to ListView code needs to be moved to onReceive of BroadCastReceiver where only the result will be available  In the case result is obtained at 2nd attempt  BroadCastReceiver needs to be unregistered after the results are obtained  size   size -1 seems unnecessary    Find below the modified code of  Android as a working example   WifiScanner java which is the Main Activity  package com arjunandroid wifiscanner   import android app Activity  import android content BroadcastReceiver  import android content Context  import android content Intent  import android content IntentFilter  import android net wifi ScanResult  import android net wifi WifiManager  import android os Bundle  import android util Log  import android view View  import android widget ArrayAdapter  import android widget Button  import android widget ListView  import android widget TextView  import android widget Toast   import java util ArrayList  import java util List   public class WifiScanner extends Activity implements View OnClickListener        WifiManager wifi      ListView lv      Button buttonScan      int size   0      List lt ScanResult gt  results       String ITEM KEY    key       ArrayList lt String gt  arraylist   new ArrayList lt  gt         ArrayAdapter adapter          Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState                super onCreate savedInstanceState           getActionBar   setTitle  Widhwan Setup Wizard             setContentView R layout activity wifi scanner            buttonScan    Button  findViewById R id scan           buttonScan setOnClickListener this           lv    ListView findViewById R id wifilist             wifi    WifiManager  getApplicationContext   getSystemService Context WIFI SERVICE           if  wifi isWifiEnabled      false                        Toast makeText getApplicationContext     wifi is disabled  making it enabled   Toast LENGTH LONG  show                wifi setWifiEnabled true                     this adapter    new ArrayAdapter lt  gt  this android R layout simple list item 1 arraylist           lv setAdapter this adapter            scanWifiNetworks               public void onClick View view                scanWifiNetworks               private void scanWifiNetworks             arraylist clear            registerReceiver wifi receiver  new IntentFilter WifiManager SCAN RESULTS AVAILABLE ACTION             wifi startScan             Log d  WifScanner    scanWifiNetworks             Toast makeText this   Scanning       Toast LENGTH SHORT  show                BroadcastReceiver wifi receiver  new BroadcastReceiver                   Override         public void onReceive Context c  Intent intent                        Log d  WifScanner    onReceive                results   wifi getScanResults                size   results size                unregisterReceiver this                try                               while  size  gt   0                                        size--                      arraylist add results get size  SSID                       adapter notifyDataSetChanged                                                catch  Exception e                                Log w  WifScanner    Exception    e                                          activity wifi scanner xml which is the layout file for the Activity   lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android      android orientation  vertical      android padding  10dp      android layout width  match parent      android layout height  match parent  gt        lt ListView         android id    id wifilist          android layout width  match parent          android layout height  312dp          android layout weight  0 97    gt         lt Button         android id    id scan          android layout width  match parent          android layout height  50dp          android layout gravity  bottom          android layout margin  15dp          android background   android color holo green light          android text  Scan Again    gt   lt  LinearLayout gt    Also as mentioned above  do not forget to add Wifi permissions in the AndroidManifest xml   lt uses-permission android name  android permission ACCESS WIFI STATE    gt   lt uses-permission android name  android permission CHANGE WIFI STATE    gt

User · Answer

Try this code  public class WiFiDemo extends Activity implements OnClickListener              WifiManager wifi             ListView lv      TextView textStatus      Button buttonScan      int size   0      List lt ScanResult gt  results       String ITEM KEY    key       ArrayList lt HashMap lt String  String gt  gt  arraylist   new ArrayList lt HashMap lt String  String gt  gt         SimpleAdapter adapter          Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState                 super onCreate savedInstanceState           setContentView R layout main            textStatus    TextView  findViewById R id textStatus           buttonScan    Button  findViewById R id buttonScan           buttonScan setOnClickListener this           lv    ListView findViewById R id list            wifi    WifiManager  getApplicationContext   getSystemService Context WIFI SERVICE           if  wifi isWifiEnabled      false                        Toast makeText getApplicationContext     wifi is disabled  making it enabled   Toast LENGTH LONG  show                wifi setWifiEnabled true                        this adapter   new SimpleAdapter WiFiDemo this  arraylist  R layout row  new String     ITEM KEY    new int     R id list value             lv setAdapter this adapter            registerReceiver new BroadcastReceiver                          Override             public void onReceive Context c  Intent intent                                results   wifi getScanResults                   size   results size                             new IntentFilter WifiManager SCAN RESULTS AVAILABLE ACTION                                   public void onClick View view                 arraylist clear                      wifi startScan             Toast makeText this   Scanning        size  Toast LENGTH SHORT  show            try                        size   size - 1              while  size  gt   0                                    HashMap lt String  String gt  item   new HashMap lt String  String gt                                            item put ITEM KEY  results get size  SSID          results get size  capabilities                    arraylist add item                   size--                  adapter notifyDataSetChanged                                                      catch  Exception e                                     WiFiDemo xml     lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android      android layout width  match parent      android layout height  match parent      android layout margin  16dp      android orientation  vertical  gt        lt LinearLayout         android layout width  match parent          android layout height  wrap content          android gravity  center vertical          android orientation  horizontal  gt            lt TextView             android id    id textStatus              android layout width  0dp              android layout height  wrap content              android layout weight  1              android text  Status    gt            lt Button             android id    id buttonScan              android layout width  wrap content              android layout height  40dp              android text  Scan    gt       lt  LinearLayout gt        lt ListView         android id    id list          android layout width  match parent          android layout height  match parent          android layout marginTop  20dp  gt  lt  ListView gt   lt  LinearLayout gt    For ListView- row xml   lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android      android layout width  match parent      android layout height  wrap content      android orientation  vertical      android padding  8dp  gt        lt TextView         android id    id list value          android layout width  match parent          android layout height  wrap content          android textSize  14dp    gt   lt  LinearLayout gt    Add these permission in AndroidManifest xml   lt uses-permission android name  android permission ACCESS WIFI STATE    gt   lt uses-permission android name  android permission CHANGE WIFI STATE    gt   lt uses-permission android name  android permission ACCESS COARSE LOCATION    gt   lt uses-permission android name  android permission ACCESS FINE LOCATION    gt

User · Answer

refer below link for getting ScanResult with redundant ssid removed from the list  duplicate SSID in scanning wifi result

User · Answer

In addition for the accepted answer you ll need the following permissions into your AndroidManifest to get it working     lt uses-permission android name  android permission ACCESS WIFI STATE    gt    lt uses-permission android name  android permission CHANGE WIFI STATE    gt

[java] How can I get Android Wifi Scan Results into a list?

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